1 /*
2 Copyright (C) 2014 Fredrik Johansson
3
4 This file is part of Arb.
5
6 Arb is free software: you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version. See <http://www.gnu.org/licenses/>.
10 */
11
12 #include "arb.h"
13
14 void
arb_get_lbound_arf(arf_t u,const arb_t x,slong prec)15 arb_get_lbound_arf(arf_t u, const arb_t x, slong prec)
16 {
17 arf_t t;
18 arf_init_set_mag_shallow(t, arb_radref(x));
19
20 arf_sub(u, arb_midref(x), t, prec, ARF_RND_FLOOR);
21 }
22